Question Set C

TN 12th Standard Chemistry Coordination Chemistry Creative Questions Study Material - QB365

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Questions:

Multiple Choice Question

65 x 1 = 65

The pyrimidine bases present in RNA are :

(a)

Cytosine and Thiamine

(b)

Cytosine and Adenine

(c)

Cytosine and Uracil

(d)

Cytosine and Guanine

Which one of the following is incorrectly matched
a) Tollen’s reagent - AgNO₃ + NaOH
b) Fehling’s Solution - CuSO₄ + Rochelle salt
c) Fenton’s reagent - FeSO₄ + H₂O₂
d) Bayer’s reagent - Cold dilute alkaline KMnO₄

(a)

PHBV

(b)

PHB

(c)

PLA

(d)

PCL

Bithional is generally added to soaps as an additive to function as a/an ______________.

(a)

Drier

(b)

Buffering agent

(c)

Antiseptic

(d)

Softner

Which of the following does not show mutarotation?

(a)

(-) Fructose

(b)

(+) Lactose

(c)

(+) Maltose

(d)

(+) Sucrose

Pyridoxine is vitamin

(a)

B₁

(b)

B₂

(c)

B₆

(d)

B₁₂

The maximum work that can be obtained from a galvanic cell is _______.

(a)

(b)

-nFE_cell

(c)

+nFE_cell

(d)

\(\infty\)

\(\alpha=\frac{\Lambda_{\mathrm{m}}}{\Lambda_{\mathrm{m}}^{0}}\) is called _______.

(a)

dissociation constant

(b)

Degree of dissociation

(c)

Ionisation Constant

(d)

Degree of hydrolysis

The half life period of a first order reaction is 5 minutes, the time required for 99.9% completion is nearly equal to______.

(a)

99.9 minutes

(b)

49.95 minutes

(c)

50 minutes

(d)

10 minutes

10.

Reaction in which the rate increases with temperature is ______.

(a)

exothermic reaction

(b)

endothermic reaction

(c)

any of the above

(d)

none of the above

11.

Wilkinson's catalyst is used for hydrogenation of ________.

(a)

alkanes

(b)

alkynes

(c)

alkenes

(d)

oils

12.

The \(\triangle\)₀ value of [Fe(CN)₆]^3- ________.

(a)

14000 cm^-1

(b)

35000 cm^-1

(c)

25000 cm^-1

(d)

18000 cm^-1

13.

In the brown ring test, brown colour of the ring is due to ______.

(a)

a mixture of NO and NO₂

(b)

Nitroso ferrous sulphate

(c)

Ferrous nitrate

(d)

Ferric nitrate

14.

It is used as a fluorinating reagent _______.

(a)

BF₃

(b)

HBF₄

(c)

PhF

(d)

B₂O₃

15.

Halo acids have no reaction with _______.

(a)

(b)

(c)

(d)

16.

Thermodynamically the most stable allotropic form of carbon is ________.

(a)

diamond

(b)

graphite

(c)

fullerenes

(d)

nano tubes

17.

Cr₂O₃ can be reduced by ______.

(a)

Alumino thermic process

(b)

Mond's process

(c)

Cyanide process

(d)

Hydrogen reduction

18.

The order of reactivity of carboxylic acid derivatives is _______.

(a)

Acid chloride > Ester > Amide > Acid anhydride

(b)

Acid chloride > Acid anhydride > Ester > Amide

(c)

Acid chloride > Amide > Acid anhydride > Ester

(d)

Acid anhydride > Ester > Amide > Acid chloride

19.

The compound used in the preparation of the tranquilizer, sulphonal is _________.

(a)

acetone

(b)

acetophenone

(c)

isopropyl alcohol

(d)

glycol

20.

_________ is used in the manufacture of thermo softening plastic perspex.

(a)

acetaldehyde

(b)

acetone

(c)

acetophenone

(d)

benzophenone

21.

The IUPAC name of is \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ C } =CH-\underset { \overset { | }{ O } }{ C } -{ CH }_{ 3 }\)

(a)

4-methylpent - 3- en 2- one

(b)

2-methylpent - 3- en 2- one

(c)

3-methylpent - 2- en 1- one

(d)

None of these

22.

Pick out the compounds that gives effervescence with aqueous NaHCO₃.
I. C₆H₅OH
II. C₆H₅NH₂
III. (CH₃CO)₂O
IV. CH₃COOH

(a)

I and II

(b)

I and IV

(c)

III and IV

(d)

III and I

23.

Haze is a colloidal solution of _______.

(a)

gas in liquid

(b)

liquid in gas

(c)

gas in solid

(d)

solid in gas

24.

Diethyl ether can be decomposed with ______.

(a)

(b)

KMnO₄

(c)

NaOH

(d)

H₂O

25.

Which of the following has an offensive odour?

(a)

Phenol

(b)

Benzy lalcohol

(c)

Acrolein

(d)

Benzyl benzoate

26.

For W/O emulsion, the principle emulsifying agent is _______.

(a)

proteins

(b)

synthetic soaps

(c)

lampblack

(d)

gums

27.

Terylene is an example of _______.

(a)

polyamide

(b)

polythene

(c)

polyester

(d)

polysaccharide

28.

Drugs that bind to the receptor site and inhibit its natural function are called _______.

(a)

antagonists

(b)

agonists

(c)

enzymes

(d)

molecular targets

29.

\(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.

(a)

Heptanoic acid

(b)

2-Iodohexane

(c)

Heptane

(d)

Heptanol

30.

Which one given below is a non-reducing sugar?

(a)

Glucose

(b)

Sucrose

(c)

maltose

(d)

Lactose

31.

CH₃CH₂ Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\) D' is________.

(a)

bromomethane

(b)

α - bromo sodium acetate

(c)

methanamine

(d)

acetamide

32.

Which one of the following will not undergo Hofmann bromamide reaction.

(a)

CH₃CONHCH₃

(b)

CH₃CH₂CONH₂

(c)

CH₃CONH₂

(d)

C₆H₅CONH₂

33.

Ethanoic acid \(\overset { P/{ Br }_{ 2 } }{ \longrightarrow } \) 2-bromoethanoic acid. This reaction is called _______.

(a)

Finkelstein reaction

(b)

Haloform reaction

(c)

Hell – Volhard – Zelinsky reaction

(d)

none of these

34.

\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.

(a)

Formaldelyde

(b)

di acetone ammonia

(c)

hexamethylene tetraamine

(d)

oxime

35.

(CH₃)₃-C-CH(OH) CH₃ \(\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } \)X (major product)

(a)

(CH₃)₃ CCH = CH₂

(b)

(CH₃)₂C = C (CH₃)₂

(c)

CH₂= C(CH₃)CH₂-CH₂- CH₃

(d)

CH₂= C (CH₃) - CH₂- CH₂- CH₃

36.

Which one of the following is the strongest acid.

(a)

2 - nitrophenol

(b)

4 – chlorophenol

(c)

4– nitrophenol

(d)

3 – nitrophenol

37.

Which one of the following is correctly matched?

(a)

Emulsion - Smoke

(b)

Gel - butter

(c)

foam - Mist

(d)

whipped cream - sol

38.

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

39.

How many faradays of electricity are required for the following reaction to occur MnO₄^-→ Mn²⁺

(a)

(b)

(c)

(d)

40.

The number of electrons that have a total charge of 9650 coulombs is_______.

(a)

6.22 ×10²³

(b)

6.022 ×10²⁴

(c)

6.022 ×10²²

(d)

6.022 ×10⁻³⁴

41.

The solubility of AgCl (s) with solubility product 1.6 × 10^-10 in 0.1M NaCl solution would be _______.

(a)

1.26 × 10^-5M

(b)

1.6 × 10^-9M

(c)

1.6 × 10^-11M

(d)

Zero

42.

Which of these is not likely to act as Lewis base?

(a)

BF₃

(b)

PF₃

(c)

(d)

F^–

43.

Which of the following is correct?

(a)

H₃PO₃ is dibasic and reducing

(b)

H₃PO₃ is dibasic and non-reducing

(c)

H₃PO₄ is tribasic and reducing

(d)

H₃PO₃ is tribasic and non-reducing

44.

Crystals of NaCI has yellow colour due the presence of_________.

(a)

cation vacancy

(b)

F centres

(c)

both (a) and (b)

(d)

neither (a) nor (b)

45.

The diffraction of crystal of Ba with X-ray of wavelength 2.29\(\mathring { A } \) gives a first order reflection at 27°8. What is the distance between the diffracted patterns?

(a)

5.02 \(\mathring { A } \)

(b)

0.398 \(\mathring { A } \)

(c)

2.51 \(\mathring { A } \)

(d)

10.04 \(\mathring { A } \)

46.

The silicates which contain discrete tetrahedral units are _______.

(a)

ortho silicates

(b)

sheet silicates

(c)

pyrosilicates

(d)

three dimensional silicates

47.

Which of the following statement is correct for 3d-transition element?

(a)

All metals except Zn and Sc form 'MO' Oxide

(b)

All metals except Sc forms 'MO' Oxide

(c)

All metals except Zn forms 'MO' Oxide

(d)

All metals except Mn forms 'MO' Oxide

48.

The lanthanide contraction is responsible for the fact that _______.

(a)

Zr and Zn have the same oxidation state

(b)

Zr and Hf have almost the same radius

(c)

Zr and Nb have similar oxidation state

(d)

Zr and Y have similar radius

49.

An example of a chelating ligand is _______.

(a)

NO^-2

(b)

Chloro

(c)

Bromo

(d)

50.

Which of these statements about [Co(CN)₆]^3- is true?

(a)

[CO(CN)₆]^3- has four unpaired electrons and will be in a high spin configuration

(b)

[Co(CN)₆]^3- has four unpaired electrons and will be in a low spin configuration

(c)

[CO(CN)₆]^3- has no unpaired electrons and will be in a high spin configuration

(d)

[CO(CN)₆]^3- has no unpaired electrons and will be in low spin configuration

51.

The rate constant of a reaction is 5.8 x 10^-2 S^-1 The order of the reaction is ______.

(a)

First order

(b)

zero order

(c)

Second order

(d)

Third order

52.

For a reaction Rate = k[acetone]^3/2 then unit of rate constant and rate of reaction respectively is _______.

(a)

(mol L^-1 S^-1),(mol^1/2L^1/2S^-1)

(b)

(mol^-1/2L^1/2s^-1),(mol L^-1s^-1)

(c)

(mol^1/2L^1/2s^-1),(mol L^-1s^-1)

(d)

(mol L s^-1),(mol^1/2L^1/2s)

53.

The crystal with a metal deficiency defect is ________.

(a)

NaCl

(b)

FeO

(c)

ZnO

(d)

KCl

54.

The vacant space in bcc lattice unit cell is ________.

(a)

48%

(b)

23%

(c)

32%

(d)

26%

55.

Crystal field stabilization energy for high spin d⁵ octahedral complex is _______.

(a)

-0.6\({ \Delta }_{ 0 }\)

(b)

(c)

2(P-\({ \Delta }_{ 0 }\))

(d)

2(P+\({ \Delta }_{ 0 }\))

56.

Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.

(a)

+2 and 0 respectively

(b)

+3 and 0 respectively

(c)

+3 and -1 respectively

(d)

+1 and +1 respectively

57.

The most common oxidation state of actinoids is _______.

(a)

(b)

(c)

(d)

58.

How many moles of I₂ are liberated when 1 mole of potassium dichromate react with potassium iodide?

(a)

(b)

(c)

(d)

59.

The molarity of given orthophosphoric acid solution is 2M. Its normality is _______.

(a)

(b)

(c)

(d)

none of these

60.

Which is true regarding nitrogen?

(a)

least electronegative element

(b)

has low ionisation enthalpy than oxygen

(c)

d- orbitals available

(d)

ability to form pπ-pπ bonds with itself

61.

Carbon atoms in fullerene with formula C₆₀have _______hybridisation.

(a)

sp³ hybridised

(b)

sp hybridised

(c)

sp² hybridised

(d)

partially sp² and partially sp³ hybridised

62.

An aqueous solution of borax is________.

(a)

neutral

(b)

acidic

(c)

basic

(d)

amphoteric

63.

Cupellation is a process used for the refining of________.

(a)

Silver

(b)

Lead

(c)

Copper

(d)

iron

64.

Zinc is obtained from ZnO by________.

(a)

Carbon reduction

(b)

Reduction using silver

(c)

Electrochemical process

(d)

Acid leaching

65.

Which one of the following reaction represents calcinations?

(a)

\(2Zn+{ O }_{ 2 }\rightarrow 2ZnO\)

(b)

\(2ZnS+3O_{ 2 }\rightarrow 2ZnO+2SO_{ 2 }\)

(c)

\(MgCO_{ 3 }\rightarrow MgO+CO_{ 2 }\)

(d)

Both (a) and (c)

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Answers Key:

Multiple Choice Question

65 x 1 = 65

(a)
2

(a)
PHBV

(d)
(+) Sucrose

(b)
-nFE_cell

(b)
Degree of dissociation

10.

11.

12.

(b)
35000 cm^-1

13.

(b)
Nitroso ferrous sulphate

14.

(a)
BF₃

15.

16.

(b)
graphite

17.

(a)
Alumino thermic process

18.

(b)
Acid chloride > Acid anhydride > Ester > Amide

19.

(a)
acetone

20.

(b)
acetone

21.

(a)
4-methylpent - 3- en 2- one

22.

23.

(d)
solid in gas

24.

(a)
HI

25.

26.

27.

28.

(a)
antagonists

29.

(a)
Heptanoic acid

30.

(b)
Sucrose

31.

32.

(a)
CH₃CONHCH₃

33.

34.

X - HCHO
Y - (CH₂)₆N₄

35.

(CH₃)₂C = C (CH₃)₂

36.

37.

(b)
Gel - butter

38.

dispersion medium-gas
dispersed phase-liquid

39.

7MnO₄^- + 5e^- → Mn²⁺ + 4H₂O
5 moles of electrons i.e., 5F charge is required.

40.

41.

AgCl_(s) ⇌ Ag⁺_(aq) + Cl^-_(aq)
NaCl → Na⁺ +Cl^-
0.1M 0.1M 0.1M
K_sp = 1.6 × 10^-10
K_sp = [Ag⁺][ Cl^-]
K_sp = (s) (s + 0.1)
0.1 >>> s
∴ s + 0.1 = 0.1
∴ s = 1.6 × 10^-10/ 0.1 = 1.6 × 10^-9

42.

BF₃ → electron deficient → Lewis acid
PF₃ → electron rich → Lewis base
CO → having lone pair of electron → Lewis base
F → unshared pair of electron → Lewis base

43.

(a)
H₃PO₃ is dibasic and reducing

44.

(b)
F centres

45.

(b)
0.398 \(\mathring { A } \)

46.

(b)
sheet silicates

47.

(b)
All metals except Sc forms 'MO' Oxide

48.

(b)
Zr and Hf have almost the same radius

49.

(d)
en

50.

(d)
[CO(CN)₆]^3- has no unpaired electrons and will be in low spin configuration

51.

(a)
First order

52.

Rate = k[A]ⁿ
Rate = \(\frac{-\mathrm{d}[\mathrm{A}]}{\mathrm{dt}}\)
unit of rate = \(\frac{mol L^{-1}}{s}\)=mol L^-1/s^-1
unit of rate constant
\(=\frac{ (mol{ L }^{ -1 }{ S }^{ -1 }) }{ ({ mol }{ L }^{ -1 })^n } \)
= mol^1-nL^n-1s^-1
in the case
rate = k [Acetone]^3/2
n = 3/2
= mol^1-(3/2)L^(3/2)-1s^-1
(mol^-(1/2)L^(1/2)s^-1).